Parallelometer



Jan. 29, 1924. 1,482,149

F. `11er-:MY

PARALLELOMETER Filed Aug. 22, 1922 Patented Jan. 29, 1924.

j emr r-I tti Means refinar a. animierter encontra, NEW YORK'.

ranannnnoianrna.

,Application ledAugust 22,-*19224 Serial No. 583,486. v

To @ZZ 'infima/ @my concern i Re it known that l, FPANK J. Barriga citi-`zen of' the United States, residingin the city7 of New Yo'rlnborough ofBrooklyn, in

5 the county of Kings and State of New. York,

have invented a certain new and useful linprovement in 'Parallelometersfof which the following is a specilication.

The invention relates to instruments em` y 10 ployed in dentistry in theconstruction of` removable bridges, and the objectof the invention is toprovide an instrument on whichV the model may be firmly mounted inproper positionA with meansfor indicating parallelism ofthe seats of theinlays, adapted to be adjusted accurately in allv required directions toconform to the work, and to maintain such adjustmentv reliably. I

The invention consists in certain novel rangement by which the aboveobjects are attained, to be hereinafter described and claimed.

The accompanying :drawings form a partV of this specification and showan approved form of the invention,

Figure 1 is a side view of the improved parallelometer.

Figure 2 kis a. corresponding plan or top view.

Figure 3 is a vertical section, partly in front elevation, the plane orsectiony being indicated by. the line 8 3 in Figure 2.

Figure 4 is a vertical section through certain portions, taken on theline 4-4 in Figure 1 and partly in rear elevation.

Similar reference numerals indicate the same parts in all the ligures.

The base 5 `of the instrument is shown as rectangular, having a largeopening 6 therein, on which is removably mounted, by bolts 7, a platform8 provided with 4a central circular opening 94 and concentric slots10and 11 adapted to afford means for fastening firmly thereto the model,not shown, in the desired position corresponding to the positionoccupied by the teeth which are to serve as abutments for the completedbridgeY Mounted onthc base 5 immediately in rear of the platform 8 is avertically disposed standard 12 supported rupon a ball l13 securedthereto by a neck 14 in axial alinement with the standard and seated ina hemispherical socket at 15 in the base and arranged. to permit thestandard to be infeatures anddetails of construction and arkisslottedfas at 24 parallel `with and closely clined in all directionswithin the limits af-i forded by the opening" 16in a hemisphericalcollar' 17 having'laterally extended lugs 18 by which' the collar issecured to the base by the screws 19 with sufficient frictiona-l'pressure upon the inclosed ball to insure the maintenance of thestandard 1n the vertical or lany inclined position in whichit be placed.l n each side face of the standard is a vertical rib 20 serving asguides for a yoke 21 inclosingthe standard and carrying a shelf 22projecting over the 'platform 8 and movable vertically with the `'yoke2l toward and. from the platform. The shelf is held at the desired.height by a set screw 23 in one sideof the yoke impinging against/itsrib 20 "onthe standard. t

The shelf is semielliptical in plan to aproximate the shape of the humanjawy aud adjacent its curved sides and end.

',Upon the shelf is a. clamping plate 25 .corresponding in shape andsize ywith the shelf and similarly slotted at 26. The plate is held tothe shelf at the rear by oppositely located bolts 27 extending throughholes in the shelf and plate and through distance Washers 28 betweenthem by which the shelf and plate are held apart at the rear. Movablebolts 29 extending through the slots 24 and 26 serve to draw the plateand shelf t0- gether at the front and clamp between them the square bars30 and 31 of approximately the same thickness as the washers 28. I

Each bar carries at its outer overhanging y end a boss 82 drilledvertically to receive a rod 33 slidably ,mounted therein and held by a;set screw 34. On the lower ends of the rods are rectangular heads 35 ofthe required sha-pe to match vthe cavities in the inlays which aretemporarily mounted in the model and adapted subsequently to receive theends of the bridge as usual in this class of dental work.

By loosening the nuts of the bolts 29 the bars 30 andv 81 may be shiftedin any position angularly to each other withtheir rods 33 at therequired distance apart, and the heads 35 may be adjusted as to heightrela-k tively to each other and held by the screws 34 which also'permitthe rods to be partially rotated in the bosses so that the plane facesof the heads 35 may be adjusted angularly relatively to each other. v

The ball and socket support for the standi ton 39 on the( projectingshaft of the pinion.

The instrumentvwhen set With the heads 'in the desired positions Willremain reliably in `adjustment with the heads properly presentedrelatively to each other and to the model to insure the desiredparallelism of th-e Work While permitting the elevation of vthe headsoutl of the Way above the model` to Iallow easy access to the latter inmaking observations or any changes required vin the Work.

I claim l l. In avdevice of the character set forth, a base, a standardthereon, a shelf movable vertically on said standard,A a clamping plateon said shelf, bars'mounted between said shelf and plate and heldadjustably thereby, andv rods adjustably mounted in said bars.` A

2. In a device of the character set forth, a base, a platform thereonadapted to receive and hold a model, a standard on said base, a shelfmovable vertically on said standard and'projecting above saidplatform,bars adjustably mounted on said shelf, andi-ods adjustablymounted in said bars.

3. In a device of the character set forth, abase, a vertically disposedstandard mounted thereon, mea-ns for holding said standard adjustably inan inclined position relatively to said base, and vertically disposedrods carried by said standard.

4;. In a device of the character set forth, a base, a verticallydisposed standard mount ed thereon, means for holding said standardadjustably in an inclined posit-ion relatively to said base; a Shelf,aryoke on the latter, a rack onsaid standard, a pinion mounted in Saidyoke and in mesh With said rack, clamping means on said shelf, Vbarsheld by such clamping means, and rods adj ustably mounted in said bars.

5. In adevice of the character set forth, K

a base, a vertically disposed standard mounted on saidbas'e by a balland socket joint, means for engagingksuch ball frictionally to hold'said standard at the desired angle lto said base, a shelf, a yoke onthe latter inclosing said standard, a rack on saidstandard, a inion insaidk yoke in.l mesh with said rac a plate on said shelf, bars betweensaid shelf and`plate,rmeans for clamping said plate upon said bars, andlrods adjustably mounted in said bars.

In testimony that I claim the invention above set forth I affix Vmysignature.

j kFRANK J. REMY.

